Clear and present danger- Ukraine’s reactors remain at risk

Grossi and others insist that the nuclear plants themselves are not the problem. “It’s very simple, the problem in Ukraine and in Russia is they are at war. The problem is not nuclear energy,” he told the BBC in an interview.

Except that it IS the nuclear plants that are the problem. After all, if Ukraine was powered by renewables and not nuclear plants, this wouldn’t even be an issue.

Bombardments in Ukraine keep reactors in the crosshairs

Ukraine’s reactors remain at risk as one-year anniversary of war looms

Clear and present danger, Beyond Nuclear, By Linda Pentz Gunter 29 Jan 23

A year ago, even before Russia invaded Ukraine, we ran our first article about the very real dangers of commercial nuclear power plants being caught up in a war.

A year later, we can thank only luck that what we predicted could happen, hasn’t. And the pinnacle — or, more accurately, nadir — of that “could” would be a catastrophic attack resulting in a major radioactive release.

Since the war began, the 15 Ukraine reactors situated at four sites, along with the defunct Chornobyl nuclear plant, have been at the center of media attention, once again bringing to light the inherent and extreme dangers of nuclear power plants at any time, let alone during an armed conflict. And, on a few occasions, all of those sites have also been in the crosshairs of actual fighting, most notably the six-reactor Zaporizhzhia nuclear power plant, the largest both in Ukraine and all of Europe.

Despite pleadings by the International Atomic Energy Agency and its director, Rafael Grossi, not to engage in combat close to the nuclear plants, no effective deterrent or peaceful protective measure has been found or implemented, even as the IAEA continues to urge the creation of safe zones around the nuclear sites.

Except that it IS the nuclear plants that are the problem. After all, if Ukraine was powered by renewables and not nuclear plants, this wouldn’t even be an issue. As an Austrian government briefing paper, collected under “Fairy tales by the nuclear lobby,” said: “A ‘successful’ attack on a nuclear power plant in densely populated Europe would have radiological and economic consequences far beyond those experienced after Chernobyl or Fukushima. So far, no terrorist attacks on wind turbines or solar panels have been reported.”

An attack or other precipitating events caused by the war in Ukraine, could still result in such a disaster. Sadly, with the war raging on, nothing has really changed since the February 24, 2022 invasion.

Since it’s the most dangerous, being the largest, and also the closest to the worst of the fighting, let’s take Zaporizhzhia as our test case.

There are approximately 200 different radioactive isotopes contained in any given nuclear reactor and its waste inventories. Zaporizhzhia houses at least 2,204 tons of highly radioactive waste within the reactors and the irradiated fuel pools, according to a March 2022 Greenpeace analysis, looking at 2017 figures, the latest data available. At least 855 tons of those wastes are in the pools. The quantities are so high because the reactors have been in operation for several decades. The first unit came on line in 1985, the sixth in 1996.

Among those 200 isotopes are iodine-131, which attacks the thyroid, cesium-134 that accumulates in muscle and strontium-90 which acts like calcium in the body and is easily incorporated into bone. Since all reactors also make plutonium-239 — with a half-life of 24,000 years — as part of the fission process, it, too, could be propelled into the environment. As an alpha-emitting particle, it is most dangerous when inhaled, attacking lungs, kidneys and other organs.

As we have written frequently at Beyond Nuclear since our first article appeared and the Russian war on Ukraine followed, there are a number of scenarios that could precipitate such a catastrophe. It could involve a full or partial reactor meltdown, an irradiated fuel pool fire or hydrogen explosion, or a breach of the radioactive waste storage casks.

The specific scenarios for this are described with essential detail and great clarity in the special section on “Nuclear Power and War” in the 2022 edition of the World Nuclear Industry Status Report.

“Unlike all other types of power plants, the safety of a nuclear power plant depends on continuously functioning cooling systems,” the WNISR authors write in the chapter introduction. “The physical reason for this is the radioactive decay of the fission products and transuranic elements produced by neutron capture on uranium. During this decay, considerable amounts of heat are generated, so-called decay heat. If it is not continuously removed by cooling, this leads to strong heat buildup, which can cause melting, fires, or other events that can cause major releases of radioactive materials. During operation and directly after a reactor shutdown, cooling requirements are particularly high.”

This also means that even when the reactors are shut down, as at least four have been at Zaporizhzhia, they are not out of danger. And the fuel pools present the greatest threat, as the radioactive waste inventory they contain is more radioactive than the fresh fuel before it is loaded into the reactor.

But it need not take a full blown attack to cause at least some of these disastrous outcomes. It could be as simple as a loss of power, or human error. ……………………………………………………………………………………………………………..

As we ponder this in the context of the perils of war, we must also remember that war just makes this outcome [a Chornobyl type disaster] more likely. A major nuclear disaster is still possible — and even probable — on a daily basis at any nuclear power plant anywhere and at any time. Loss of power and human error remain key causes, along with violent weather events — occurrences that will continue to become more frequent and more severe as the climate crisis worsens. Sabotage and terrorism are an ever-present possibility as well.

This means that striving for the unrealistic goal, as the IAEA does, of ensuring nuclear reactors are not caught up in a war zone, doesn’t make us all that much safer. Only the complete elimination of nuclear power as an energy source will achieve that.

Linda Pentz Gunter is the international specialist at Beyond Nuclear and writes for and curates Beyond Nuclear International. https://beyondnuclearinternational.org/2023/01/29/clear-and-present-danger/